Why cant I play under and fighter in same parlay?

Can someone tell me why? I use 5dimes

shitty books like that don't want to be exposed on the market.

If you wanted to bet a fighter to win with the under, you'd simply bet your fighter by knockout. 

  First, if you already straight bet the fight, often a maximum amount is allowed. So adding a parlay would be over the allowed amount. Also, they prohibit certain fights from this.
  Also, this would not be considered a true correlated wager. A correlated wager is one that clearly give the player an increased edge to the point that in the long run they now how a clear advantage. The best example is if you wagered NFL, and bet a parlay on OVER in the 1st half w/ OVER in the game. Clearly if you win part one, your chances increases for the OVER in the game total.
  An even more non-permitted wager is the 2/3s automatic. Using the NFL example, let's say you now did a three team parlay. You bet the same game and bet (1) OVER 1st half (2) OVER 2nd Half, at this point you realize that once those win the last leg (3) OVER for total game, is an automatic. These are bets they never take. The earlier example is almost a never.
  Now if you bet a two team parlay on the same NFL game, (1) OVER 1st half (2) OVER 2nd Half, these bets are allowed as you have no gained or automatic advantage.
  A common example for NFL is many people parlay MNF. Without making this a handicapping seminar, some basic like when you have a double digit favorite you are gonna bet, very rarely you should bet the under with it, for the simple reason that if the opponent gets a few lucky touchdowns, you can't win. Team A (-14.5) vs Team B (41.5), if Team B quickly scores 14 points then Team A would have to score over 28 to cover, thus the total would be 42 and a loss. It's not good practice to parlay, and when you do don't take a big favorite and the under.

During a Superbowl (Greenbay vs Denver), I was able to parlay 1st & 2nd quarters w/ the 1st half, and then I did the same for the second half. I also, did the 1st half & 2nd half with the game total. In 1998, online sportsbooks were just getting general media popular and your local bookie was getting more police problems and now competition. My local guy allowed those bets as he was overwhelmed with calls (they were taking wagers 3 hours prior and until kickoff) and didn't refuse much action. After I won he stated that he didn't realize they were correlated and he doesn't take them but paid out regardless as I put in bets for some office friends and they blew enough to make him happy.
   I know it's hard finding sportsbooks taking Ivy League Football spreads, but in the mid-90s, unless you went to the school that played and got local action, it was pretty much a no go for many. I remember my bookie called me and wanted lines because his biggest player was an Alumnus of an Ivy League and wanted to bet his school. I use to use the weekly paper College & Pro football weekly (among other sources), and although they never had any odds, they listed the match-ups and current stats. I told my book to write down (1) my true line (2) public line if made (3) what to make each line as I knew the guy bet 90% favorites, so you could pad the game and also, always add 1/2 point and get a win/loss and no ties (or push).

One other handicapping method (trick). End of season in football I would sometimes find a few great opportunities. A great one that happened rarely (but very profitable) would be this scenario:

NFL - You have a team playing evening that has clinched playoff and home field advantage is (A) they win tonight or (B) a certain early game with a contending team loses. Also is the team has had a QB playing injured among other players, the rest would be crucial. Since you can't wait because the line will move you can do one of several methods.
Wager: Straight $100- Team A (pk) -110 (vs Team B) 1PM EST
  Parlay (2) $100 - Team B (pk)  1PM EST & Team Z (-7) 4PM EST
(1) The early game I put in a 2-team parlay with the contending team (for this instance, let's say I bet the to lose). I would also, flat bet them to win (making it a wash, minus any vig). The first game would depend on the way I bet it (many other ways as I will show in NFL thread), in this case it's a push! Now if I lose the straight wager, that means my Parlay is alive, and also that Team X will most likely rest their QB and other players as it becomes an irrelevant game to them. Now let's go back to the numbers
Straight $100- Team A (pk) -110 = $-110 (Loser)
Parlay (2) $100 - Team B (pk) (WIN) & Team Z (line change PK) 4PM EST... I have many options... middle, side, let-it-ride.
If I let the wager stand and team Z wins I win +$260 - $110 earlier for a win of $150. I risked $100 to win $150.
Now if I wanted to take no chances I could bet Team X $100 (pk)... now I either lose -$10 TOTAL, or I could win $100+$100 ($200), or -$110+$260+100 ($250)... etc. For the average to experienced handicapper they know and see this clearly. I was hoping to bring a thought process to players more so than a method.
GL!!! I didn't proof read this stuff so if it contains any typos are inaccuracies, any poster please correct as I been up and traveling with my eyes falling out!