is my shower tray level

[Cranswick]

l had a new shower tray installed , it feels uneven like standing on a slope, but it slopes towards the drain which is good as the water drains well. l was wondering if the slope is becasue the tray has an inbuilt slope or is it because the tray was not installed level. l have some photos with a spirit level. THere is a slope inside the shower but outer rim of the base seems fairly level , you can see the bubble photo on the left from inside the shower is way outside the line but the spirit level on the outer rim of the shower on the far right photo, you can the bubble just touches the line. The outer rim looks level but inside the shower theres a big slope .THe photos look hazy you need to click on each photo to enlarge to see clearly

 

[matlob]

The tray should be level around the outside lip. There is a built in slope towards the drain internally but shouldn't be that noticeable. Install looks fine

 

[Cranswick]

THe slope towards to drain feels steep like l am standing on a slope, but from the spirit level photo on the far right the outer rim of the base seems fairly level. Do some trays come with inbuilt slopes steeper then others

 

[matlob]

From your level on the outside lip it's probably about an extra centimeter off level across the length which exaggerates it

 

[Cranswick]

is a cm off level considered much or not something to worry about