Tyres advice

[Tony5496]

Hi can someone help me out I've had four new tyres fitted and three of them are losing air. I am a bit confused as the old wheel balancers on the outside have been taken off all the wheels as I've asked them to be balanced on the inside as it looks better. but just had a look and they have left all the old balancers on the outer edge of all four wheels can't understand why they have not been taken off like the front balancers

[snab80]

Rough edges on the alloy/ steel wheel creating a poor seal.
Did they change the valves?
Are the valves faulty? Wet your finger and run it over the top of the valve, if it bubbles it's losing air although it's more likely to be the seal itself.
As for the weights on the wheels,  normally all the old the old ones inside and out are removed prior to rebalancing.
If they are alloys then they should be stuck on the inside edge of the alloy rather than clipped on the rim like they do on steels.
Sounds like they've not done a proper job on them.