Nah... its because the worth value or value of ATX (that is included in the worth value), is quoted from the higher bid on the market (https://atexoras.engine.splex.gg/trade/ATX) and not from the price you see in the pool. Hence why the worth changes... depending on what bids are set on the market.
Effectively, what I am trying to say, is, if the market bids follow the pool price, then the shown worth will be correct/aligned with the real worth of the pool. Otherwise, it will show a different value (usually lower) than what it is (given the case of the pool being the place where there are most of the tokens/volume, etc).
For pools where this plays around (aka, most volume and tokens are on the market), then usually the pool aligns easily to the price represented on the market.