That series of negotiations was instructive about Rick Smith, GM.
Each time, a player who had been very good for the Texans wanted to renegotiate his contract. A leak is made to the press about an exorbitant, though unconfirmed, offer made by the Texans that was summarily turned down. Player gets villified by fan base for being greedy and negotiating in the press.* An impasse would be reached and Smith would use his "big stick" of free agency rules to keep the player. The fans celebrate because Smith is tough.
One of Smith's responsibilities is to negotiate contracts to lock up players the team needs to keep long term. The contract needs to be one that both the team and the player will sign. He has failed at that much more than a good GM should. Also, if the contract offers are to be believed, he: A) routinely tries to overpay players and B) can't even get a contract signed that his heavily in the player's favor.
Rick Smith is part of the problem.
*Kudos to the Texans PR department, boo to Houston media hacks, and a "C'mon, think about it" to Houston fans. The player didn't release those details; it came from the Texans because it made them look good and the player look bad.