My UTAULoids sound weird when singing fast notes

[Mellonn-chan]

When it comes to fast notes it sounds incomprehensible. Here is a vid of Otouri Melo singing Tetoris (the lost media version).
Here’s the link

 

[SaKe]

Edit the oto and move the overlap behind the consonant.

 

[SunnyWolves]

Oh hey, I actually made the ust used in the original lost media version. Cool, cool.
Anyways, assuming you're using original utau, it sounds like that because you did not fit the ust. Select all notes, right click one and open region properties, select clear and the double click the box next to stp, and then in the upper right corner click reset, p2p3, p1p4, and acpt.

 

[Mellonn-chan]

Edit the oto and move the overlap behind the consonant.

Like this?

 

[Mellonn-chan]

Is it supposed to be between the preutterance and consonant?