First problem: Pianoteq is being overly precise. 386.31 is not shown as 5/4 - the third decimal is necessary! The sounds in Pianoteq can never have such accuracy, and in almost all cases 386.31 cents can well be called pure 5/4. One decimal would be enough for this Cents/ratio view: it would be more useful that way. Or the desired accuracy could be user-definable.

Second problem: Pianoteq shows absurd integer ratios if they happen to match its search algorithm. I am just looking at a tuning where Pianoteq shows the interval of 900 cents as 1226/729. This is senseless. 1226 is the octave of the prime 613. There is absolutely no point in using ratios which such extremely high primes as 613. As in other tuning software that enables ratio interpretations of cent values, the prime-limit should be fixed to something like 19, or, better, be user-selectable. As is, the 'Cents or ratio' view is almost useless because it always shows these unreadable and nonsensical ratios here and there.