Tiles are double-shuffled at the beginning of every game, so every deal is completely random. Nothing in the game attempts to give you a particular hand or avoid hands you've played recently.
One of the interesting things about true randomness is that it doesn't necessarily look random. Streaks and repetition naturally occur, so you may sometimes receive similar combinations of tiles in consecutive games or find yourself working toward the same hand several times in a relatively short period. If we artificially prevented that from happening, the deals would actually be less random, not more.
It's also very natural, as we become familiar with a card, to gravitate toward certain hands and patterns that we recognize quickly. That can make similar starting tiles lead us toward the same hands even when the actual deals are quite different.
If you'd like to explore some of the other possibilities those tiles may offer, the exercises in the Exercise Room (under the Play menu) are a great way to practice spotting alternative hands and pivots.